The belt breaking will not have damaged the oil seal, its simply come to the end of its life. To replace the oil seal is not as simple as removing bottom pulley, fitting new seal and refitting pulley. Behind the sepentine pulley and covers is the cam belt pulley. To remove that you have to remove the cam bely along with all the front covers. Whilst it is off replace the cam belt. On a 1.6 its sensible to fit new guide and tenstion pulleys to the cam belt while its off, do the same on a 1.8.

The bottom pulley bolt will normally come off with an air gun but you need a really good prosessional one, the cheap DIY ones are simply not up to the job.

>> how did we ever manage without pwer steering .

By having steering racks geared for more turns lock-to-lock and thus requiring less effort to turn. Also larger steering wheels to provide more leverage.

I once had an Austin 1800 "Land Crab". Front wheel drive and built like a tank. No power steering but driveable, if a bit heavy. The drawback to being able to do that is that the number of full turns of the wheel it took to take the steering through its full travel would not have felt out of place on the ship's wheel of a Tea Clipper and the steering wheel was the same size as the road wheels.